Assertion A : From consideration of structural soundness and economy of design, most codes control the maximum slenderness ratio of masonry walls and columns. Reason R : By controlling the maximum slenderness ratio, failure is by excessive stress and not by buckling.?_x005F_x000D_Select your answer according to codes given below.

• A. Both A and R are true and R is the correct explanation of A.
• B. Both A and R are true but R is not .the correct explanation of A.
• C. A is true but R is false.
• D. A is false but R is true.